Vulnerability · Published Jun 1, 2026 · Assigned by VulDB
CVE-2026-10277j3k0 mcp-google-workspace MCP Gmail Tool gmail.ts saveToDisk access control
Medium 6.3
In plain English
A medium-severity improper access control in mcp-google-workspace from j3k0. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).
Official description
A vulnerability was found in j3k0 mcp-google-workspace up to 831790e7d5c2663325733d9f5579cc339a267c4c. This issue affects the function saveToDisk of the file src/tools/gmail.ts of the component MCP Gmail Tool. Performing a manipulation results in improper access controls. It is possible to initiate the attack remotely. The exploit has been made public and could be used. This product is using a rolling release to provide continious delivery. Therefore, no version details for affected nor updated releases are available. The patch is named 89c091ecf8b9f9c7291d1af0b1966e271f86551c. It is suggested to install a patch to address this issue.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| j3k0 | mcp-google-workspace | 831790e7d5c2663325733d9f5579cc339a267c4c |
Weakness: CWE-284, CWE-266 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
References
- VDB-367570 | j3k0 mcp-google-workspace MCP Gmail Tool gmail.ts saveToDisk access control vdb-entry, technical-description
- VDB-367570 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
- CVE-2026-10277 | CVE Analysis and Report third-party-advisory
- Submit #825416 | j3k0 mcp-google-workspace 1.0.0 Arbitrary File Write third-party-advisory
- https://github.com/j3k0/mcp-google-workspace/issues/19 exploit, issue-tracking
- https://github.com/j3k0/mcp-google-workspace/pull/22 issue-tracking, patch
- https://github.com/j3k0/mcp-google-workspace/commit/89c091ecf8b9f9c7291d1af0b1966e271f86551c patch
- https://github.com/j3k0/mcp-google-workspace/ product